Who makes a 120 volt timer?

I am looking for a 120 volt timer. One that has up to a 3 hour time. What I am looking for is the type that you turn on and it stays on for a designated amount of time then shuts off. Not the type that comes on and off daily. I have seen these as a "in wall" switch type. What do you call them? I've tried to do some web searching. Any suggestions? I just bought a Dyson cordless vac and want to use a timer. It says it takes 3 hours to complete a full charge. So every time I use it I want to put it back in it's changing cradle and set the switch to charge for 3 hours. That way I do not cook the battery dead in a year like one would if you have it charging all the time like they suggest.

Thanks
Rodney

 

http://www.1000bulbs.com/In-Wall-Spring-Wound-Timers/35704/

Found it. Spring wound. 6 hours. They go from one hour to six hours to twelve hours. I bought the 6 hour.

Thanks
Rodney